china composite manhole covers manufacturer and supplier. china walton manhole covers co ltd 
Strictly manufacture according to ISO9001:2000 and BS-EN124.
-100% waterproof, Weatherproof, Corrosion free material.
-Contain Zero metal, no scrap value, no one will steal it.
-High load capacity, it can be used in all kinds of road according to its load ablility.
-Long service life(at least can be used 30 years)
-Can be made in decorative surface designs even with Logo & different granite finishes.
-Good temperature resistance from -40?c to 80?c Centigrade.
-SGS and BS-EN124 Tested approved.